At the moment, Tesla and carmakers in Japan and Germany use different plugs and communication protocols to link batteries to chargers, but firms building the charging networks needed for electric vehicles to become mainstream say the number of plug formats will need to be limited to keep costs down.

Carmakers behind the winning technology will benefit from having an established supply chain and an extensive network, making their vehicles potentially more attractive to customers worried about embarking upon longer journeys, analysts say.

Manufacturers that back losing plugs, however, could end up with redundant research and development and may have to invest to adapt assembly lines and vehicle designs so their customers can use the most widespread fast-charging networks.

Swiss bank UBS has estimated that $360bn will need to be spent over the next eight years to build global charging infrastructure to keep pace with electric car sales, and it will be key to limit the numerous technologies now in use.

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